#include <iostream>

using namespace std;

class Person
{
public:
	void identify()
	{
		cout << _name << endl;
	}

protected:
	string _name;
	string _address;
	string _tel;
	int _age;
};

class Student : public Person
{
public:
	void study()
	{
		cout << "study" << _name << endl;
	}

protected:
	int _stuid;
};

class Teacher : public Person
{
public:
	void teaching()
	{
		cout << "teaching" << _name << endl;
	}

protected:
	string title;
};

int main()
{

	return 0;
}